this post was submitted on 22 Jan 2024
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From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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I have an embedded device that runs as root and has busy box. I accidentally ran chmod -x on one of the busy box sym links (strings I think) and it made all of the core utils un-executable. Unfortunately chmod is a core util. Every bash command was throwing wild errors and outputing gobbledygook. You really start to sweat when ls and cat stop working.
I had full disk image of the device and started deducing the issue. Luckily I could still execute non core utils and ssh/scp was working so I wrote a little program to restore permissions, uploaded/ran the binary, and learned nothing from the experience.